syzbot


WARNING in inc_nlink (2)

Status: upstream: reported C repro on 2020/11/01 15:25
Reported-by: syzbot+3fbbd90094e3d827144b@syzkaller.appspotmail.com
First crash: 601d, last: 4d14h

Fix bisection: failed (bisect log)
similar bugs (6):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in inc_nlink (2) C inconclusive done 21 110d 447d 22/22 fixed on 2022/03/08 16:11
upstream WARNING in inc_nlink (3) C error 128 4d12h 100d 0/22 upstream: reported C repro on 2022/03/17 16:37
linux-4.19 WARNING in inc_nlink C done 8 676d 825d 1/1 fixed on 2020/09/18 07:23
linux-4.14 WARNING in inc_nlink C done 21 683d 826d 1/1 fixed on 2020/09/11 09:49
linux-4.14 WARNING in inc_nlink (2) C 47 5d04h 597d 0/1 upstream: reported C repro on 2020/11/06 09:55
upstream WARNING in inc_nlink C done 26 713d 816d 17/22 fixed on 2020/09/16 22:51

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 8089 at fs/inode.c:343 inc_nlink.cold+0x11/0x18 fs/inode.c:343
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 8089 Comm: syz-executor278 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x5a kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:inc_nlink.cold+0x11/0x18 fs/inode.c:343
Code: c0 74 04 3c 03 7e 08 8b 5d 48 e9 e7 68 b4 f9 4c 89 e7 e8 aa 99 a3 f9 eb ee e8 43 bd 6d f9 48 c7 c7 80 b0 74 88 e8 a2 ee fe ff <0f> 0b e9 29 6a b4 f9 e8 2b bd 6d f9 48 8d 7b 40 b8 ff ff 37 00 48
RSP: 0018:ffff88809d217ce8 EFLAGS: 00010282
RAX: 0000000000000024 RBX: ffff88808db566c0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1013a42f8f
RBP: 0000000000000000 R08: 0000000000000024 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: ffff88808db56708
R13: ffff88808e5b74a0 R14: ffff8880b3756c00 R15: ffff8880b0d74a40
 v9fs_vfs_mkdir_dotl+0x4eb/0x610 fs/9p/vfs_inode_dotl.c:463
 vfs_mkdir+0x508/0x7a0 fs/namei.c:3819
 do_mkdirat+0x262/0x2d0 fs/namei.c:3842
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fef17341829
Code: 28 c3 e8 5a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd3f371918 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007ffd3f371928 RCX: 00007fef17341829
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200002c0
RBP: 00007ffd3f371920 R08: 00007fef172ffaf0 R09: 00007fef172ffaf0
R10: 0000000020000340 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (94):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-19 2022/05/27 14:20 linux-4.19.y 3f8a27f9e27b 116e7a7b .config log report syz C WARNING in inc_nlink
ci2-linux-4-19 2022/03/15 02:48 linux-4.19.y 3f8a27f9e27b 9e8eaa75 .config log report syz C WARNING in inc_nlink
ci2-linux-4-19 2022/03/15 02:27 linux-4.19.y 3f8a27f9e27b 9e8eaa75 .config log report syz C WARNING in inc_nlink
ci2-linux-4-19 2022/03/15 02:07 linux-4.19.y 3f8a27f9e27b 9e8eaa75 .config log report syz C WARNING in inc_nlink
ci2-linux-4-19 2022/02/13 14:14 linux-4.19.y 3f8a27f9e27b 8b9ca619 .config log report syz C WARNING in inc_nlink
ci2-linux-4-19 2022/02/13 13:42 linux-4.19.y 3f8a27f9e27b 8b9ca619 .config log report syz C WARNING in inc_nlink
ci2-linux-4-19 2021/09/15 08:39 linux-4.19.y b172b44fcb17 07e953c1 .config log report syz C WARNING in inc_nlink
ci2-linux-4-19 2020/11/30 06:09 linux-4.19.y 0c88e405c97e a0092f9d .config log report syz C
ci2-linux-4-19 2020/11/01 15:38 linux-4.19.y f5d8eef067ac 8bc4594f .config log report syz C
ci2-linux-4-19 2022/06/22 00:10 linux-4.19.y 3f8a27f9e27b 0fc5c330 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/06/16 05:01 linux-4.19.y 3f8a27f9e27b 1719ee24 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/06/03 18:41 linux-4.19.y 3f8a27f9e27b eee80d3c .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/05/30 09:24 linux-4.19.y 3f8a27f9e27b a46af346 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/05/28 15:31 linux-4.19.y 3f8a27f9e27b a46af346 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/05/28 13:51 linux-4.19.y 3f8a27f9e27b a46af346 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/05/25 17:54 linux-4.19.y 3f8a27f9e27b 3037caa9 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/05/18 06:24 linux-4.19.y 3f8a27f9e27b 744a39e2 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/05/09 11:56 linux-4.19.y 3f8a27f9e27b 8b277b8e .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/05/06 11:54 linux-4.19.y 3f8a27f9e27b efeff0a5 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/05/06 11:44 linux-4.19.y 3f8a27f9e27b efeff0a5 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/05/01 01:12 linux-4.19.y 3f8a27f9e27b 2df221f6 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/04/30 18:21 linux-4.19.y 3f8a27f9e27b 2df221f6 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/04/27 02:32 linux-4.19.y 3f8a27f9e27b 1fa34c1b .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/04/22 10:19 linux-4.19.y 3f8a27f9e27b 2738b391 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/04/13 14:21 linux-4.19.y 3f8a27f9e27b b17b2923 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/04/09 01:21 linux-4.19.y 3f8a27f9e27b e22c3da3 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/04/08 12:02 linux-4.19.y 3f8a27f9e27b c6ff3e05 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/03/29 15:07 linux-4.19.y 3f8a27f9e27b 6bdac766 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/03/23 19:05 linux-4.19.y 3f8a27f9e27b 5ff41e94 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/03/13 16:35 linux-4.19.y 3f8a27f9e27b 9e8eaa75 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/03/08 06:31 linux-4.19.y 3f8a27f9e27b 7bdd8b2c .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/02/13 12:48 linux-4.19.y 3f8a27f9e27b 8b9ca619 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/02/01 00:08 linux-4.19.y 3f8a27f9e27b 6b7c57fe .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/01/28 22:28 linux-4.19.y 3f8a27f9e27b 495e00c5 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/01/13 14:56 linux-4.19.y 3f8a27f9e27b 44d1319a .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/01/13 06:30 linux-4.19.y 3f8a27f9e27b 44d1319a .config log report info WARNING in inc_nlink
ci2-linux-4-19 2022/01/08 23:13 linux-4.19.y 3f8a27f9e27b 2ca0d385 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/10/19 05:20 linux-4.19.y 3f8a27f9e27b 24dc29db .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/06/09 02:18 linux-4.19.y 1722257b8ece 5c2fe346 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/06/01 03:09 linux-4.19.y 6b7b0056defc 032639db .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/05/31 13:20 linux-4.19.y 6b7b0056defc 032639db .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/05/28 12:44 linux-4.19.y 6b7b0056defc 858ea628 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/05/21 20:17 linux-4.19.y 3c8c23092588 3c7fef33 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/05/21 09:54 linux-4.19.y 3c8c23092588 3c7fef33 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/05/18 06:06 linux-4.19.y 3c8c23092588 a343ba6b .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/05/17 15:12 linux-4.19.y 3c8c23092588 a2eb125d .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/05/17 03:21 linux-4.19.y 3c8c23092588 f54a5c09 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/05/16 10:05 linux-4.19.y 3c8c23092588 f54a5c09 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/05/13 11:13 linux-4.19.y 3c8c23092588 ed7d41c5 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/05/10 23:43 linux-4.19.y 3c8c23092588 ca873091 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/05/04 07:16 linux-4.19.y 97a8651cadce 09efdd63 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/05/02 06:27 linux-4.19.y 97a8651cadce 77e2b668 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/04/29 09:40 linux-4.19.y 97a8651cadce 77e2b668 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/04/22 18:05 linux-4.19.y 2965db2e004c 33c28d03 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/04/19 17:00 linux-4.19.y 2965db2e004c 50f523d7 .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/04/19 04:18 linux-4.19.y 2965db2e004c 7e2b734b .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/04/11 09:31 linux-4.19.y 830a059cbba6 6a81331a .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/04/09 03:00 linux-4.19.y b4454811f122 6a81331a .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/04/08 07:40 linux-4.19.y b4454811f122 6a81331a .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/04/08 03:01 linux-4.19.y b4454811f122 6a81331a .config log report info WARNING in inc_nlink
ci2-linux-4-19 2021/01/16 22:33 linux-4.19.y 675cc038067f 65a7a854 .config log report info
ci2-linux-4-19 2020/11/15 00:04 linux-4.19.y 31acccdc8774 1bf9a662 .config log report info
ci2-linux-4-19 2020/11/06 10:03 linux-4.19.y b94de4d19498 cba33199 .config log report info
ci2-linux-4-19 2020/11/01 15:25 linux-4.19.y f5d8eef067ac 8bc4594f .config log report info